EP0352637A2
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EP
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Ferroelectric liquid crystal composition, liquid crystal optical device produced by using the ferroelectric liquid crystal composition, and method of producing the liquid crystal optical device
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1989-07-20
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Granted: —
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Expires: 2009-07-20
Abstract
Abstract A ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material; a liquid crystal optical device comprising a layer of the ferroelectric liquid crystal composition, the (A) ferroelectric liquid crystal material in the ferroelectric liquid crystal composition has been uniaxially oriented and two substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, at least one of the electrode layers being a transparent electrode layer; and a method of producing the liquid crystal optical device, which method comprises orienting a liquid crystal optical device yet to be oriented which includes a layer of the ferroelectric liquid crystal composition and two flexible substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, by subjecting the liquid crystal optical device yet to be oriented to a bending treatment.
Inventors
- 👤 Kimihiro C/O Idemitsu Kosan Co. Ltd. Yuasa
- 👤 Satoshi C/O Idemitsu Kosan Co. Ltd. Hachiya
- 👤 Kazuharu C/O Idemitsu Kosan Co. Ltd. Morita
- 👤 Kenji C/O Idemitsu Kosan Co. Ltd. Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133365; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3857; C09K19/3876; C09K19/388; C09K19/52; C09K19/54; C09K19/542; C09K19/544
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
19 words
1 A ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material.
Claim 2
Dependent Claim
19 words
1 A ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material.
Claim 3
Dependent Claim
39 words
The ferroelectric liquid crystal composition as claimed in claim 1 comprising from 40 to 97 % by weight of the (A) ferroelectric liquid crystal material and from 3 to 60 % by weight of the (B) non-liquid-crystalline polymeric material.
Claim 4
Dependent Claim
41 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (A) ferroelectric liquid crystal material consists of at least one kind of ferroelectric polymeric liquid crystal having a number average molecular weight of not less than 1,000.
Claim 5
Dependent Claim
32 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (A) ferroelectric liquid crystal material consists of at least one kind of ferroelectric low molecular weight liquid crystal.
Claim 6
Dependent Claim
55 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (A) ferroelectric liquid crystal material is a mixture of at least one kind of ferroelectric polymeric liquid crystal having a number average molecular weight of not less than 1,000 and at least one kind of ferroelectric low molecular weight liquid crystal.
Claim 7
Dependent Claim
55 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (A) ferroelectric liquid crystal material is a mixture of at least one kind of ferroelectric polymeric liquid crystal having a number average molecular weight of not less than 1,000 and at least one kind of non-ferroelectric low molecular weight liquid crystal.
Claim 8
Dependent Claim
44 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (A) ferroelectric liquid crystal material is a mixture of at least one kind of non-ferroelectric polymeric liquid crystal and at least one kind of ferroelectric low molecular weight liquid crystal.
Claim 9
Dependent Claim
24 words
The ferroelectric liquid crystal composition as claimed in claim 7 wherein the non-ferroelectric polymeric liquid crystal exhibits smectic A phase or smectic C phase.
Claim 10
Dependent Claim
39 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (A) ferroelectric liquid crystal material is a mixture of at least two kinds of non-ferroelectric low molecular weight liquid crystals or non-ferroelectric polymeric liquid crystals.
Claim 11
Dependent Claim
31 words
The ferroelectric liquid crystal composition as claimed in claim 9 wherein the non-ferroelectric low molecular weight liquid crystals or non-ferroelectric polymeric liquid crystals exhibit smectic A phase or smectic C phase.
Claim 12
Dependent Claim
34 words
The ferroelectric liquid crystal composition as claimed in claim 1 or 2 wherein the (B) non-liquid-crystalline polymeric material is selected from the group consisting of thermoplastic resins, resins having crosslinking ability, and mixtures thereof.
Claim 13
Dependent Claim
37 words
The ferroelectric liquid crystal composition as claimed in claim 11 wherein the (B) non-liquid-crystalline polymeric material consists of at least one kind of thermoplastic resin having a glass transition temperature of not lower than 30 °C .
Claim 14
Dependent Claim
30 words
The ferroelectric liquid crystal composition as claimed in claim 11 wherein the (B) non-liquid-crystalline polymeric material consists of at least one kind of thermosetting or photo-curable resin having crosslinking ability.
Claim 15
Dependent Claim
63 words
A liquid crystal. optical device comprising a layer of a ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material, the (A) ferroelectric liquid crystal material being uniaxially oriented and two electrode layers supporting the layer of the ferroelectric liquid crystal composition between them, at least one of the electrode layers being a transparent electrode layer.
Claim 16
Dependent Claim
63 words
A liquid crystal. optical device comprising a layer of a ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material, the (A) ferroelectric liquid crystal material being uniaxially oriented and two electrode layers supporting the layer of the ferroelectric liquid crystal composition between them, at least one of the electrode layers being a transparent electrode layer.
Claim 17
Dependent Claim
27 words
The liquid crystal optical device as claimed in claim 14 wherein the ferroelectric liquid crystal composition is as defined in any of the claims 2 to 13.
Claim 18
Dependent Claim
75 words
A liquid crystal optical device comprising a layer of a ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material, the (A) ferroelectric liquid crystal material being uniaxially oriented and two substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, at least one of the electrode layers being a transparent electrode layer.
Claim 19
Dependent Claim
75 words
A liquid crystal optical device comprising a layer of a ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material, the (A) ferroelectric liquid crystal material being uniaxially oriented and two substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, at least one of the electrode layers being a transparent electrode layer.
Claim 20
Dependent Claim
27 words
The liquid crystal optical device as claimed in claim 16 wherein the ferroelectric liquid crystal composition is as defined in any of the claims 2 to 13.
Claim 21
Independent Claim
88 words
A method of producing a liquid crystal optical device, which method comprises orienting a liquid crystal optical device yet to be oriented which includes a layer of a ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material and two flexible substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, by subjecting the liquid crystal optical device yet to be oriented to a bending treatment.
Claim 22
Independent Claim
88 words
A method of producing a liquid crystal optical device, which method comprises orienting a liquid crystal optical device yet to be oriented which includes a layer of a ferroelectric liquid crystal composition comprising (A) a ferroelectric liquid crystal material and (B) a non-liquid-crystalline polymeric material and two flexible substrates which support the layer of the ferroelectric liquid crystal composition between them and carry on their surfaces facing each other their respective electrode layers, by subjecting the liquid crystal optical device yet to be oriented to a bending treatment.
Claim 23
Dependent Claim
154 words
The method of producing a liquid crystal optical device as claimed in claim 18 wherein the liquid crystal optical device yet to be oriented is subjected to a bending treatment within a temperature range in which the ferroelectric liquid crystal composition exhibits a coexisted phase of isotropic phase and smectic A phase, a coexisted phase of isotropic phase and chiral smectic C phase, smectic A phase or chiral smectic C phase or the liquid crystal optical device yet to be oriented is subjected to a bending treatment while the liquid crystal optical device yet to be oriented is being cooled from a temperature at which the ferroelectric liquid crystal composition exhibits isotropic phase, a coexisted phase of isotropic phase and smectic A phase or a coexisted phase of isotropic phase and chiral smectic C phase to a temperature at which the ferroelectric liquid crystal composition exhibits smectic A phase or chiral smectic C phase.
Claim 24
Dependent Claim
33 words
The method of producing a liquid crystal optical device as claimed in claim 18 or 19 wherein the ferroelectric liquid crystal composition is as defined in any of the claims 2 to 13.
Claim 25
Dependent Claim
119 words
The method of producing a liquid crystal optical device as claimed in claim 18 or 19 wherein the liquid crystal optical device yet to be oriented is subjected to a bending treatment with the bending direction of the bending treatment adjusted so that the bending direction and the optically principal axis (orientation direction) of at least one of the substrates approximately make, on the plane of the substrate, the tilt angle ϑ of the ferroelectric liquid crystal composition or 90° - ϑ , or so that the bending direction and the longitudinal direction of the substrates approximately make, on the planes of the the substrates, the tilt angle ϑ of the ferroelectric liquid crystal composition or 90° -ϑ .
Claim 26
Dependent Claim
31 words
The method of producing a liquid crystal optical device as claimed in claim 21 wherein the ferroelectric liquid crystal composition is as defined in any of the claims 2 to 13.
Claim 27
Independent Claim
95 words
A method of producing a liquid crystal optical device, which method comprises providing a layer of a ferroelectric liquid crystal composition comprising a ferroelectric liquid crystal material and a resin having crosslinking ability on the electrode layer of a substrate carrying electrode layer, laminating another substrate carrying electrode layer on the substrate carrying electrode layer which has been provided, on its electrode layer, with the layer of the ferroelectric liquid crystal composition, so that the layer of the ferroelectric liquid crystal composition lies between the electrode layers, and crosslinking sufficiently the resin having crosslinking ability.
Claim 28
Independent Claim
95 words
A method of producing a liquid crystal optical device, which method comprises providing a layer of a ferroelectric liquid crystal composition comprising a ferroelectric liquid crystal material and a resin having crosslinking ability on the electrode layer of a substrate carrying electrode layer, laminating another substrate carrying electrode layer on the substrate carrying electrode layer which has been provided, on its electrode layer, with the layer of the ferroelectric liquid crystal composition, so that the layer of the ferroelectric liquid crystal composition lies between the electrode layers, and crosslinking sufficiently the resin having crosslinking ability.
Claim 29
Dependent Claim
136 words
24 . A method of producing a liquid crystal optical device, which method comprises, in sequence, providing a layer of a ferroelectric liquid crystal composition comprising a ferroelectric liquid crystal material and a resin having crosslinking ability on the electrode layer of a substrate carrying electrode layer, laminating an opposite substrate carrying electrode layer on the substrate carrying electrode layer which has been provided, on its electrode layer, with the layer of the ferroelectric liquid crystal composition, so that the layer of the ferroelectric liquid crystal composition lies between the electrode layers, to obtain a liquid crystal optical device yet to be oriented, uniaxially orienting the ferroelectric liquid crystal composition enclosed in the liquid crystal optical device yet to be oriented, and crosslinking the resin having crosslinking ability enclosed in the oriented liquid crystal optical device.
Claim 30
Dependent Claim
136 words
24 . A method of producing a liquid crystal optical device, which method comprises, in sequence, providing a layer of a ferroelectric liquid crystal composition comprising a ferroelectric liquid crystal material and a resin having crosslinking ability on the electrode layer of a substrate carrying electrode layer, laminating an opposite substrate carrying electrode layer on the substrate carrying electrode layer which has been provided, on its electrode layer, with the layer of the ferroelectric liquid crystal composition, so that the layer of the ferroelectric liquid crystal composition lies between the electrode layers, to obtain a liquid crystal optical device yet to be oriented, uniaxially orienting the ferroelectric liquid crystal composition enclosed in the liquid crystal optical device yet to be oriented, and crosslinking the resin having crosslinking ability enclosed in the oriented liquid crystal optical device.
Claim 31
Dependent Claim
50 words
25 . The method of producing a liquid crystal optical device as claimed in claim 24 wherein the substrate is a flexible substrate and the uniaxial orientation of the ferroelectric liquid crystal composition is conducted by subjecting the liquid crystal optical device yet to be oriented to a bending treatment.
Claim 32
Dependent Claim
154 words
The method of producing a liquid crystal optical device as claimed in claim 25 wherein the liquid crystal optical device yet to be oriented is subjected to a bending treatment within a temperature range in which the ferroelectric liquid crystal composition exhibits a coexisted phase of isotropic phase and smectic A phase, a coexisted phase of isotropic phase and chiral smectic C phase, smectic A phase or chiral smectic C phase or the liquid crystal optical device yet to be oriented is subjected to a bending treatment while the liquid crystal optical device yet to be oriented is being cooled from a temperature at which the ferroelectric liquid crystal composition exhibits isotropic phase, a coexisted phase of isotropic phase and smectic A phase or a coexisted phase of isotropic phase and chiral smectic C phase to a temperature at which the ferroelectric liquid crystal composition exhibits smectic A phase or chiral smectic C phase.
Claim 33
Dependent Claim
118 words
The method of producing a liquid crystal optical device as claimed in claim 25 or 26 wherein the liquid crystal optical device yet to be oriented is subjected to a bending treatment with the bending direction of the bending treatment adjusted so that the bending direction and the optically principal axis (orientation direction) of at least one of the substrates approximately make, on the plane of the substrate, the tilt angle ϑ of the ferroelectric liquid crystal composition or 90° -ϑ , or so that the bending direction and the longitudinal direction of the substrates approximately make, on the planes of the the substrates, the tilt angle ϑ of the ferroelectric liquid crystal composition or 90° -ϑ .
Claim 34
Dependent Claim
26 words
The liquid crystal optical device as claimed in claim 14 wherein the(B) non-liquid crystalline polymeric material is a resin having crosslinking ability which resin is crosslinked.
References Cited (Backward Citations)
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